Rotaky gas-engine



B. F. AUGUSTlNE.

ROTARY GAS ENGINE. APPUCATION FILED AUG.15,1917'.

wks I B. F. AUGUSTiNE.

ROTARY GAS ENGINE. APPLICATION man Auawfwlz.

` Patented June 2s, 1921.

5 SHEETSSHEET 2.

@Houma B. F. AUGUSTINE.

ROTARY GAS ENGINE.

APPLICATION FILED AAUG.15, 1917.

I 1,382,612, Patenagrunezs, 1921.

5 SHEETS-SHEET 3.

B. F.'AUGUST|NE.

ROTARY GAS ENGINE.

APPLICATION FILED AUG-I5, 19H.

1,382,61 2, Patented June 2s, 1921.

5 SHEETS-SHEET 4.

' B. F. AUGUSTINE.

ROTARY GAS ENGINE.

APPLICATION FILED AuG.15, 1917.

1,382,6 1 2, Patente@ June 28, 1921e 5 SHEETS-SHEET 5.

UNITED STATES BENJAMIN F. AUGUSTINE, OF BUFFALO, NEW YORK.

RO TARY GAS-ENGINE.

Application filed August 15, 1917.

To @ZZ whom t may concern Be it known that l. BENJAMIN l?. AUGUS- TINE, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York; have invented certain new and useful Improvements in Rotary Gas-Engines, of which the following is a specification.

The invention relates to more particularly to a two-cycle multiple cylinder rotary gas engine.

An object of the invention is to provide a gas engine of the above type having exhaust ports at the outer end of each cylinder and with air intake ports adjacent the inner end of the cylinder for admitting air for seavenging the cylinder.

A further object of the invention is to provide a gas engine of the above character with fuel intake ports located adjacent said air' intake ports and so disposed relative thereto that the air intake ports are opened first to admit a portion of the air before the fuel intake ports are uncovered. V

A still further object of the invention is to provide an engine of the above character wherein the cylinders are arranged radially of the axis of rotation of the engine, so that the centrifugal force acting on the gases aids in the scavenging ot the cylinder and in the supplying of air and gas to the cylinder.

A still further obj ect of the invention is to provide an engine of the above character having a fuel supply chamber which substantially surrounded by a chamber for receiving the exhaust gases. so that the fuel will be thoroughly gasiied before it enters the cylinders.

A still further object of the invention is to provide an engine of the above type with means for supplying the air first to the crank casing where the'bearings 'for the engine are cooled and the heat from the inner.

parts of the engine absorbed; before the air is led to the cylinders.

These and other objects will in part be obvious and will in part be hercintrlter more fully disclosed.

In the drawings; which show by way of illustration one embodiment of the invention.-

Figure l is a vertical sectional view through the engine7 taken longitudinally oit' Specification of Letters Patent.

ons engines. an dv Patented June 28, 1921.

Serial No. 186,416.

the shaft, the bonnet and tubes for the exhaust gases being omitted;

Fig. 2 is a transverse vertical sectional view in part through the cylinders and in part through the pumps;

Fig. 3 is a vertical sectional view longitudinally through the casing; but showing the pump cylinders in place;

Fig. 4C is an end view of the same Fig. 5 is a vertical sectional View, showing a portion of the shaft, one of the heads of the casing. a portion of the casing and two of the pump cylinders;

Fig. 5a is a fragmentary sectional view showing the exhaust outlet;

Fig. 6 is an end view of the head vof the engine casing; also showing the shaft in section;

Figuiw is a side view of the shaft;

Fig. 8 is a transverse sectional view through the shaft and the enlargement thereon;

Fig. 9 is a longitudinal sectional view of a portion of the shaft;

Fig. l0 is a view partly in section and partly in plan, of the ported section of the main shaft;

Fig. il is an end view of the shaft with the balancing plate applied thereto.

The invention consists broadly in a rooit ing casingmounted to rotate in bearings; and provided with a plurality of radially disposed cylinders. yl'he cylinders are preferably arranged in two rows and are staggered relative to one another. Each cylinder is provided with a piston having a piston rod connection `with a fixed crank shaft, so that the cylinders move relative to the pistons and thus cause the casingto rotate about the crank shaft.

The engine casing is also provided with a series of pumps, certain of which are used to supply fuel to a fuel chamber disposed within the casing and others of which are used to supply air to the crank casing. The exhaust gases pass out through ports in the ends of the cylinder and are directed to a chamber which surrounds partly or wholly the fuel supply chamber, so that the heat of the exhaust gases may be utilized for thoroughly gasifying the fuel.

Each cylinder is provided with air intake ports which uncovered. by the piston at the end of its working stroke. These ports are connected with thel crank casing, so that the air in the crank casing` placed under compression by the pumps and the heat of the inner parts of the engine, will rush' through {lr-ese air ports into the cylinder and thoroughly scavenge the cylinder, foreing the burnt gases out through the exhaust ports.

Each cylinder is also provided with fuel intake ports located between the air intake ports and these fuel intake ports are connected with the supply chamber. Said fuel intake ports are so proportioned and located relative to the air intake ports, that air enters the cylinder first and partly completes the scavenging thereof before the fuel enters. it the end of the cylinder there is a rentrant head forming an annular space adapted to receive a sleeve carried by the piston and preferably formed as a part of the piston. This sleeve serves to control the exhaust ports.

Referring more in detail to the drawings, my improved `gas engine consists of a main casing 1 having' a head 2, provided with a projecting` shaft 3 adapted to rotate in a bearing. At the other end of the casing there is a head 4., which has a bearing connection 5 with a fixed shaft 6. This fixed shaft 6 extends through the engine casing and has a bearing` 7 in the other head of the engine casing. shaft there is a crank 8. rlhis shaft is fixed or held against rotation and the casing` rotates about the shaft. The casing` is provided with a series of cylinders 9. These cylinders as clearly shown in Fig. 1, are arranged in two rows and the cylinders in the separate rows are staggered relative to one another. as clearly shown in Fig.

The casing is also provided with an opening' adapted to receive the cylinder which is held seated in the opening' by suitable means. 1n each cylinder is a piston 10. A piston rod 11 connects each piston with thc crank 8.

lach cylinder is provided with fins 12, which assist in keeping` the cylinder cool. Above the fins 12 there is a sleeve 13, and above the sleeve 13 is a reiintrant head 14. Vid ihese parts are suitably connected to the cylinder. The rentrant head 1.4i extends down into the cylinder and a spark plug 15 is mounted iu this reentrant head. r1`he cylinder wall is provided with exhaust ports 16, which lead to a chamber 17 formed in the sleeve 13.

The sleeves 11. of two adjacent cylinders:

Between the ends of theA cated a short distance from the outer Wall of the easing'.

A. second circular partition 22 is also preferably cast integral with the casing and forms a fuel supply chamber 23. The fuel supply chamber extends from end to end of the casing' and is practically surrounded by the exhaust chamber 20.

Each cylinder is provided with air intake ports 24, which are disposed adjacent the inner end of the working` stroke of the piston so that the piston uncovers these air intake ports. The casing is provided with a series of channels 25 (see Fig. which extend inwardly and connect with the crank casing, se that when the cylinder is in place these channels 25 form a series of passages connectingthe air intake ports with the crank casing.

Located between the air intake ports are fuel supply ports 26. These fuel supply ports connect with the passages 27, which in turn, are connected to the fuel supply chamber 23 (see Fig, 2).

The piston is provided with a skirt 28, which extends below the head of the piston and with a sleeve 29 which extends outwardly from the piston head. This sleeve 29 is adapted to run in the space formed between the rentrant head and the inner wall of the cylinder. Said rentrant head has an inwardly projecting' iiange 3() formed with openings 31 registering with the exhaust ports i7. The sleeve 29 is always above this flange 30.

1t will be understood, of course, that the jflinder moves and not the piston, as above noted, and while I have referred to the inner end of the working stroke of the piston, in .realit '\.7 the head of the cylinder is moved away from the piston, and it is this extreme outward movement of the cylinder to which 1 have referred as the inner end of the work in stroke of the piston.

inasmuch as the sleeve 29 is always 'in this annular space between the rentrant head and the wall of the cylinder, as the sleeve moves outward relative to the cylinder, the njas trapped in the annular space will be more or less compressed and thus forni a perfect seal. j n'eventing any leakage of the eases about the end of the sleeve.

The sleeve is formed with an inwardly eX- tendingV projection 82, which has a recess for a packing; 33. 1t is noted that this packing .is directly above the intake ports in the wall of the cylinder and the sleeve is provided with similar ports adapted to register with the ports in the wall of the cylinder. Just below the piston headv there is also a packing 34. The extended skirt 28 covers the intake ports when the cylinder moves to its extreme outer position and prevents any fuel gases from escaping into the crank casing.

From the above it will be apparent that when the piston uncovers the exhaust ports, the exhaust gases are allowed to escape, relieving the pressure in the cylinder. Substantiztlly simultaneously, but slightly after the uncovering of the exhaust ports, the air intake ports are uncovered, which permits air from the crank casing to rush outwardly into the cylinder, forcing the burnt gases outwardly to the end of the. cylinder, out through the exhaust ports and back into the exhaust chamber. After a portion of air has been allowed to enter the cylinder, forcing the burnt gases away from the head of the piston, then the fuel supply ports are un covered and gasified fuel rushes into the cylinder, thoroughly mixing with the air and forming a uniform charge.

The centrifugal force acting upon the burnt gases and also the air and fuel gases, aids in the scavenging of the cylinder and the quick supplying of the cylinder with fresh air and with the rich dry fuel gases.

The exhaust gases pass out through suitable ports to a bonnet 36 and from the bonnet to an exhaust pipe. The fuel is supplied to a supply chamber 253 by a series of pumps. ln the drawingsl l have shown six pump cylinders. Three of these cylinders, those indicated at 37, are utilized for pumping` air, while the other three indicated at 38 are utilized for pumping^ fuel. These cylinders are mounted in the engine casing and project slightly therefrom.

Located within each pump cylinder, is a piston A pitman 40 connects each piston with the fixed crank so that as the engine casing rotates, these pump cylinders will slide on the pistons. Each pump cylinder is provided. with a port 4l. This port connects with passage 42 formed in the easing. and said passage 42 registers with a passage 43 formed in the head which closes the engine casing. This head 4 is provided with au openino` through which the shaft 6 extends. lt is also provided with an enlarged chamber or recess adapted to receive the ported extension or enlargement 44 on the shaft 6.

The passages 43 leading from the ports of the air pumping cylinders 37, are adapted to register with a port 45 formed in the extension or enlargement 44 and this port 45 is connected by a lat .ral passage 46 with the crank casi f so that when the passages 43 are in register wiilh this port 41",, air be delivered from these cylinders back through these passages into the crank casing.

rThe passages 43 are also adapted to register with a port 47 on the opposite side of the extension or enlargement from the port 45. This port 47 is connected through a series of openings 48 with an annular pocket or recess 49. which in turn, is connected by means of passages with the atmosphere.

Air is drawn in through the passages 50 through the openings 48 to the port 47 and thence through the passages 43 to the pumps.

lt will be understood that the port 47 is of sufficient length so as to connect two passages 43 at the same time. In other words, before one passage 43 leaves this port, another passage 43 makes connection therewith. These passages 48 are connected with this port when the pump cylinders are moving outwardly and the pumps are drawing in air. As a result, some one of the pumps is drawing in air at all times. Likewise the port 45 is of suiiicient length to connect two of the passages 43 and, therefore, one of the pumps will be continuously supplying air to the crank casii'fg. It will be understood, of course, that the pump cylinders are cut off entirely for an interval as they pass from one port 45 to the other port 47, so as to prevent any escape of the air from the crank casing. This occurs when the piston and cyl* inder are passing dead centers so that there is no relative movement between the piston and the cylinder. Furthermore, these ports are of sufhcient length so' that no vacuum or compression occurs in the pumps. The air is drawn into the pump and transferred to the crank casing where it is put under slight compression. This air passing through the crank ca sing absorbs heat from the shaft and bearings and the inner parts of thel engine vnot only keepingthese parts cool, but also transforming the heat into a working force.

The passages 43 leading from th-e cylinders 38 are adapted to register with the port 49 formed in the extension or enlargement 44. There is a passage 50 formed in the head 4, which connects with the supply chamber 23, as clearly shown in Fig. 1 of the drawings. At certain times this port 49 connects the passage 50 with the passage 43. .ht this time the charge of fuel drawn into the pumps is delivered by the pumps through these passages to th" fuel supply chamber. At other times the passages 43 are connected with the port 5l, which extends down into the shaft and connects with the passage 52. The fuel is supplied to this passage 52 and is drsfiwn by the pumps out through the passages into the pump cylinders. These ports 49 and 5l, like the air ports, are of sufficient length so that the fuel is drawn in continuously by the pumps and transferred continuously to the fuel supply chamber, where it is put under slight compression. They are also of such length that the pump cylinders are neither under compression or under vacuum, but merely operate to trans fer the fuel to the supply chamber. The fuel entering?,` the supply chamber is subjected to the heat of the exhaust gases in the chamber surrounding the same, and the moist fuel will be carried by centrifugal force out against the hot plate forming the outer wall of the fuel supply chamber, where it will be thoroughly gasified.

In the operation of my engine, the fuel gases are taken in cold by the pumps and transferred to the fuel supply chamber. In the fuel supply chamber the gases are heated, absorbing the heat from the exhaust gases and thus transferring this heat back into a working force. The fuel will be thoroughly gasiiied in this fuel supply chamber and will be thus prepared for the cylinders. This fuel supply chamber for gasifying the fuel and many other parts of the engine are shown, described and claimed in detail in my prior Patent No. 1,229,569, granted une 12th, 1917.

As the engine rotates, first one cylinder and then the adjacent cylinder in the next row will be fired. As the engine is a twocycle engine, each cylinder is fired during each rotation of the engine. Therefore, in my present engine with twelve cylinders, there will be twelve power strokes for each rotation of the engine.

The exhaust ports are uncovered by the sleeve controlled by the piston, and as soon as these cylinders are relieved from pressure, the air intake ports begin to open, allowing the air in the crank casing to pass into the cylinder, forcing the burnt gases out through the exhaust port and thoroughly scavenging the saine. After a certain amount of air has been admitted, then the intake ports are opened, permitting the thoroughly gasified fuel to rush into the cylinder and become mixed with the air, forming a uniform charge. The centrifugal force acting on the burnt gases and on the fuel and the air, aids in quickly scavenging the cylinder and supplying the same with the new charge.

As above noted the air in the crank casing is under slight compression and in order to balance the forces therefrom, l have provided a balance plate 2 which is fixed to the end of the shaft 6 and has an air tight connection with the head 2. This balance plate is of the same diameter as the extension or enlargement 44 and therefore the force endwise on one head is balanced by the force endwise on the other head.

lt is obvious that minor changes in the construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

What is claimed is:

1. A rotary gas engine including in conibination a. rotating casing, a plurality of cylinders carried thereby, la piston for each cylinder, each cylinder having fuel intake ports uncovered by the piston, independent air intake ports disposed in the region of the fuel intake ports and uncovered by the piston, said air intake ports being larger than the fuel intake ports and being so disposed as to admit air prior to andv during the admission of fuel, and exhaust ports disposed in the opposite end of the cylinder from the air intake ports and means carried by the pistons for controlling the exhaust ports.

2. A rotary gas engine including in combination a rotating` casing, a plurality of cylinders carried thereby, a piston for each cylinder, each cylinder having fuel intake ports disposed in the region of the fuel intake ports and uncovered by the piston, said air intake ports being larger than the fuel intake ports and being so disposed as to admit air prior to and during the admission of fuel, each cylinder having a rentrant head at its outer end forming an annular space between the head and the wall of the cylinder, said cylinder having exhaust ports adjacent the rentrant head, and a sleeve carried by the piston and adapted to enter said annular space and control said exhaust ports.

3. A rotary .gas engine including in combination a fixed shaft having a crank, a casing mounted to rotate about said shaft, a plurality of radially disposed cylinders carried by the casing, a piston for each cylinder, a pitman connecting each piston with the crank, a rentrant head for each cylinder forming an annular space between the head and the wall of the cylinder, said rentrant head having an inwardly projecting liange, said cylinder and flange having alined exhaust ports, and a sleeve adapted to enter said annular space and adapted to control bination a fixed shaft having a crank, a casing mounted to rotate about said shaft, a plurality of radially disposed cylinders carried by the casing, a piston for each cylinder, a pitman connecting each piston with the crank, a rentrant head for each cylinder forming an annular space between the head and the wall of the cylinder, said reentrant head having an inwardly projecting flange, said cylinder and flange having alined exhaust ports, a. sleeve adapted to enter said annular space and adapted to control the exhaust ports, said sleeve being connected to and movable with the piston, said cylinder having intake ports at the inner end thereof, and said sleeve having openings adapted to register with said intake ports.

5. A rotary gas engine including in combination a fixed shaft having a crank, a easing mounted to rotate about said shaft, a plurality of radially disposed cylinders carried by the casing, a piston for each cylinder, a pitman connecting each piston with the crank, a rentrant head for each cylinder forming an annular space between the head and the wall of the cylinder, said rentrant head having an inwardly projecting ange, said cylinder and flange having alined exhaust ports, a sleeve adapt-ed to enter said annular space and adapted to control the exhaust ports, said sleeve being connected to and movable with the piston, said cylinder adjacent its inner end having fuel intake ports and air intake ports, said sleeve having openings formed therethrough adapted to register with the fuel and air intake ports.

6. A rotary gas engine including in combin-ation a fixed shaft having a crank, a casing mounted to rotate about said shaft, a plurality of radially disposed cylinders carried by the casing, a piston for each cylin der, a pitman connecting each piston with the crank, a rentrant head for each cylinder forming an annular space between the head and the wall of the cylinder, said rentrant head having an inwardly projecting flange, said cylinder and flange having alined ex* haust ports, a sleeve adapted to enter said annular space and adapted to control the exhaust ports, said sleeve being connected to and movable with the piston, said cylinder adjacent its inner end having fuel intake ports and air intake ports, said sleeve having openings formed therethrough adapted to register with the fuel and air intake ports, said sleeve and piston being provided respectively with recesses located above and below the air and fuel intake ports, and packing rings located in said recesses.

7. A rotary gas engine including in combination a fixed shaft, a casing rotating about said shaft and having two rows of radially disposed cylinders, the cylinders in the rows being staggered relative to each other, a piston for each cylinder, a pitman connecting each piston with the crank in said shaft, each cylinder having a rentrant head forming an annular space between the head and the wall of the cylinder, said reentrant head having an inwardly projecting flange, said cylinder and inwardly projecting flange having alined exhaust ports, a sleeve movable in said annular space for controlling the exhaust ports, said sleeve being connected to and movable with the piston.

8. A rotary gas engine including in com bination a fixed shaft, a casing rotating about said shaft and having two rows of radially disposed cylinders, the cylinders in the rows being staggered relative to each other, a piston for each cylinder, a pitman connecting each piston with the crank in said shaft, each cylinder having a ree'ntrant head forming an annular space between the head and the wall of the cylinder, said re entrant head having an inwardly projecting flange, said cylinder and inwardly projecting flange having alined exhaust ports, a sleeve movable in said annular space for controlto register with the air and fuel intakel ports.

9. A rotary gas engine including in combination a fixed shaft, a casing rotating about said shaft and having two rows of radially disposed cylinders, the cylinders in the rows being staggered relative to each other, a piston for each cylinder, a pitmau connecting each piston with the crank in said shaft, each cylinder having a rentrant head forming an annular space between the head and the wall of the cylinder, said reentrant head having an inwardly projecting flange, said cylinder and inwardly projecting flange having alined exhaust ports, a sleeve movable in said annular space for controlling the exhaust ports, said sleeve being connected to and movable with the piston, said cylinder having air intake ports and fuel intake-ports adjacent the inner end thereof and said sleeve having openings adapted to register with the air and fuel intake ports, said air intake ports being proportioned and disposed so as to admit air prior to and during the admission of the fuel gases.

l0. A rotary gas engine including in combination a fixed shaft having a crank, a casing mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages connecting with said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel supply chamber, said cylinder having exhaust ports at the outer end thereof, a casing surrounding each cylinder and exhaust ports, a pipe connecting the last named casing with the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber.

l1. A rotary gas engine including in combination a fixed shaft having a crank, a casing mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages. connecting with said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel supply chamber, said cylinder having exhaust ports at the outer end thereof, a casing surrounding each cylinder and exhaust ports, a pipe connecting the last named casing with the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber, said air and fuel intake ports being controlled by the piston, and a sleeve carried by the piston for controlling the exhaust ports.

12. A rotary gas engine including in combination a fixed shaft having a crank, a casing mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding .the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages connecting with said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel supply chamber, said cylinder having exhaust ports at the outer end thereof, a casing surrounding each cylinder' and exhaust ports, a pipe connecting the last named casing with the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber, said air and fuel intake ports being controlled by the piston, and a sleeve ,carried by the piston for controlling the exhaust ports, said cylinder having a reentrant head spaced from the wall of the cylinder to receive said sleeve, the exhaust ports being` disposed at the inner end of said rentrant head.

13. A rotary gas engine including in combination a fixed shaft having a crank, a casing mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages connecting with said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel supply chamber, said cylinder having exhaust ports at the outer end thereof, a casing surrounding each cylinder and exhaust ports, a pipe connecting the last named casing with the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber, said air and fuel intake ports being controlled by the piston, a sleeve carried by the piston for controlling the exhaust ports, said cylinder having a rentrant head spaced from the wall of the cylinder to receive said sleeve, the exhaust ports being disposed at the inner' end of said rentrant head, and means for supplying air to the crank casing and for supplying fuel to said fuel supply chamber.

14. A rotary gas engine including in combination a fixed shaft having a. crank, a casing mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages connecting with said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel supply chamber, said cylinder having exhaust ports at the outer end thereof, a casing surrounding each cylinder and exhaust ports, a pipe connecting the last named casing with the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber, said air and fuel intake portsbeing controlled by the piston, and a sleeve carried my the piston for controlling the exhaust ports, said cylinder having` a rentrant head spaced from the wall of the cylinder to receive said sleeve, the exhaust ports being disposed at the inner end of said rentrant head. a series of radially disposed pump cylinders mounted in the casing, a piston for each pump cylinder, and means whereby certain of said pumps transfers air to the air chamber and whereby certain of said pumps transfers fuel to said fuel supply chamber, A rotary gas engine including in combination a fixed shaft having a crank, a casing. mounted to rotate about said shaft, said casing having spaced cylindrical partitions forming an air chamber surrounding the crank, a fuel supply chamber surrounding said air chamber, and an exhaust chamber surrounding said fuel supply chamber, a plurality of radially disposed cylinders carried by the casing and extending through the cylindrical partitions to the air chamber, each cylinder having air intake ports at the inner end thereof, and passages connecting With said air chamber, said cylinder having fuel intake ports at the inner end thereof, and passages connecting said fuel intake ports with the fuel :supply Chamber, said Cylinder having exhaust ports at the outer end thereof, a easing surrounding each Cylinder and exhaust ports, a pipe connecting the lest named easing With the exhaust chamber whereby the exhaust gases are led from the cylinders to the exhaust chamber, and means for supplying air to the Crank l0 casing and for supplying fuel to said fuel supply chamber.

ln testimony whereof I aHX my signature.

BENJAMIN F. AUGUSTINE. 

